King of JavaScript Online HTML Editor

<!DOCTYPE html>
<html lang="en">
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Tic Tac Toe Game Board</title>
<style>
*{
     box-sizing: border-box;
}
 body{
     margin: 0;
     padding: 0;
     display: flex;
     justify-content: center;
     align-items: center;
     flex-direction: column;
}
 .players{
     border: 2px solid #0909ad;
     display: flex;
     justify-content: center;
     align-items: center;
     border-radius: 15px;
     font-size: 24px;
     margin-top: 100px;
}
 .players div{
     padding: 15px 25px;
     border-radius: 15px;
     border: 2px solid #fff;
}
 .players div.active{
     background: #0909ad;
     color: #fff;
}
 .game-board{
     margin-top: 50px;
     display: grid;
     grid-template-columns: repeat(3, auto);
}
 .cell{
     height: 100px;
     width: 100px;
     border: 2px solid #0909ad;
     font-size: 100px;
     display: flex;
     justify-content: center;
     align-items: center;
     cursor: pointer;
     border-radius: 10px;
}
 .cell.X{
     color: #09aecb;
}
 .cell.O{
     color:#e50c35;
}
 .cell:nth-child(1),.cell:nth-child(2),.cell:nth-child(3){
     border-top: none;
}
 .cell:nth-child(3n + 1){
     border-left: none;
}
 .cell:nth-child(3n){
     border-right: none;
}
 .cell:nth-child(7),.cell:nth-child(8),.cell:nth-child(9){
     border-bottom: none;
}
</style>
</head>
<body>
<div class="players">
   <div class="player1 active">O's Turn</div>
   <div class="player2">X's Turn</div>
</div>
<div class="game-board">
   <div class="cell X">X</div>
   <div class="cell X">X</div>
   <div class="cell O">O</div>
   <div class="cell"></div>
   <div class="cell O">O</div>
   <div class="cell"></div>
   <div class="cell"></div>
   <div class="cell"></div>
   <div class="cell"></div>
</div>
</body>
</html>